Volume 1: Student Life Chapter 213 Particle Accelerator Experiment
Soon, Dean Yang brought Chen Zhou and Yang Yiyi to their destination.
Yenching National Laboratory for Molecular Sciences.
Dean Yang is also the deputy director of the Nuclear Physics and Nuclear Technology Laboratory here.
Only then did Chen Zhou realize that this project had become so large that even the national laboratory was involved.
In the laboratory, a group of people in white coats were walking hurriedly and were very busy.
Because Dean Yang had reported the matter in advance for Chen Zhou and Yang Yiyi, the relevant review procedures had basically been completed.
Therefore, the two of them basically didn't waste much time with the laboratory manager and received the items needed for laboratory work.
Afterwards, Dean Yang took the two of them to the core area of the laboratory.
The people here are all core team members of the Nuclear Physics and Nuclear Technology Laboratory.
"This is Lin Xiaoen, your senior, PhD in Physics from Yanda University. This is Ma Zihao, your senior, PhD in Physics from Shuimu University. This is Peng Jia, your senior..."
Dean Yang introduced them one by one.
Chen Zhou and Yang Yiyi naturally greeted everyone one by one.
Lin Xiaoen and the others also said enthusiastically: "We heard Director Yang say that two new people would come, but we waited so long for them to come. It was really hard for us to wait."
Peng Jia also said: "Yes, when Dean Yang said this, it seemed like you had just had your summer vacation."
Chen Zhou smiled and replied, "We just finished our military training, and Dean Yang brought us here."
Lin Xiaoen looked at Chen Zhou and Yang Yiyi, and said with a smile: "I was wondering why you two look like you just came back from Africa, you are so tanned..."
"Hey, Dalin, watch your words, there's a girl here!" Peng Jia glared at Lin Xiaoen.
"It's okay, senior sister. Senior Lin is right. The sun was so strong during this military training that it didn't rain." Yang Yiyi smiled slightly, indicating that she didn't mind.
"Look, the seniors and juniors all said so..." Lin Xiaoen said.
Dean Yang glanced at them and interrupted, "Okay, enough small talk. How is the experiment preparation going?"
After hearing what Dean Yang said, Lin Xiaoen and the others immediately stopped joking.
Lin Xiaoen and Ma Zihao looked at each other, and Ma Zihao said, "Director Yang, the preparations for the experiment have been completed, and the experiment is scheduled to officially start at 10 a.m."
Dean Yang glanced at his watch. It was still half an hour before ten o'clock. "Okay. Check the experimental equipment again to ensure that the experiment can proceed smoothly. Also, Peng Jia, take Chen Zhou and Yang Yiyi with you to familiarize yourself with the experimental process."
"Okay, Director Yang (Dean)." Everyone responded in unison.
Afterwards, Lin Xiaoen and others followed Dean Yang's request and checked the experimental equipment again.
Chen Zhou and Yang Yiyi followed Peng Jia around the laboratory, familiarizing themselves with the experimental process of the particle accelerator.
"You all know the principles of the experiment, right?" Peng Jia asked as he brought the two people to the accelerator.
Chen Zhou and Yang Yiyi both nodded.
Peng Jia glanced at the two of them and said softly, "Tell me about it."
Chen Zhou and Yang Yiyi looked at each other. Is this a test for us?
Chen Zhou winked at Yang Yiyi, who understood and said, "The general principle of generating a high-power particle beam is that the Marx generator resonates and charges the pulse forming line, and then discharges the diode through the transmission line. The diode converts the electrical pulse energy into a particle beam."
After hearing Yang Yiyi's words, Peng Jia nodded, then looked at Chen Zhou, as if waiting for his additions.
Chen Zhou smiled slightly in his heart, thinking that this senior schoolmate was quite interesting, actually using such a simple principle to test the two of them.
But the principle is indeed simple, and Yang Yiyi has already explained it. What should he say?
Chen Zhou thought for a moment, met Peng Jia's gaze, and said, "The working polarity of the diode depends on the electron beam or ion beam. When high voltage is applied to the diode, the surface of the cold cathode microscopically bulges to form a 'whisker'. Field emission is formed due to field enhancement, and the whisker explodes due to Joule heating, forming a plasma sheath near the cathode."
"Electrons are emitted from the plasma sheath, which moves toward the anode at a speed of 3-5 cm/μs. The electron flow is limited by space charge in the cathode-anode gap. When a high-current ion beam is generated, the electron flow in the diode must be suppressed."
"The physics of the diode involves solving Maxwell's equations and the equations of motion for electrons under complex boundary conditions..."
"Okay, let's take a look at the composition of this accelerator." Peng Jia interrupted Chen Zhou at the right time. She just wanted to see the preparations made by the two on a whim.
It’s not that I don’t believe in Dean Yang’s vision, it’s just that many people often can’t explain the simplest principles.
"The experimental device, that is, the particle accelerator, corresponds to the principle that Junior Sister Yiyi just mentioned. It is mainly composed of a magnetic pulse generator, a double-forming wire, a pulse autotransformer, and a magnetically insulated diode or an electronic diode."
As Peng Jia spoke, he pointed at the big guy in front of him and introduced it to Chen Zhou and the others one by one.
After hearing what Peng Jia said, Yang Yiyi asked, "Senior, does this accelerator use the traditional method of generating high-current pulsed particle beams?"
Hearing this, Peng Jia nodded slightly: "That's right, after storing the static electricity energy, it is released in a very short time, and particle beam focusing technology is used to generate a high-energy-density particle beam."
After a pause, Peng Jia smiled and said, "I guess you have noticed that although Director Yang has sent you a lot of research materials, very little of it actually involves experimental equipment. If you have any questions, ask me now."
Just as Peng Jia said, most of the research materials that Dean Yang sent to Chen Zhou and the others were theoretical, and contained almost no content about experimental equipment.
Otherwise, Yang Yiyi wouldn't have known that the accelerator used in the experiment adopted the traditional method of generating high-current pulsed particle beams.
Since Senior Sister Peng Jia had said so, Chen Zhou naturally would not miss the opportunity to ask questions: "Senior Sister, I just heard you say magnetically insulated diodes or electronic diodes, so which one are we using in this experiment?"
Peng Jia glanced at Chen Zhou, paused for about 3 seconds, and then slowly said: "The theory and numerical simulation of strong pinch focusing diodes have always been a hot topic in the international research of high-current pulsed particle beam technology. Naturally, we are no exception. I won't tell you more about the details. You will know it later."
After saying that, Peng Jia continued to introduce other auxiliary devices used in the experiment to Chen Zhou and the others.
These are things that every experimenter must clearly understand and master.
At this time, Yang Yiyi whispered in Chen Zhou's ear: "You're asking too hastily."
Chen Zhou was slightly stunned, then understood instantly.
It seems that he asked the key point of the experiment.
